Although the majority of our results were not significant, with slight modifications, our results may show that permanent magnets
have a large impact on N. brevirostris. This preliminary experiment showed that these magnets are having an impact on N. brevirostris, but a modification that can be made would be a second magnetic barrier
approximately 10 cm away from the first. Similar to G. cuvier, when N. brevirostris entered the treatment region, the shark decelerated. This behavior was observed in seven out of the nineteen entrances into
the treatment zone. This observation could suggest that the electric fields produced by the magnets are in fact being detected by N. brevirostris. With only one field being present, the lemon shark can
potentially push through this field. But, by placing a second magnetic barrier, thus another electric field, it is possible that as the shark decelerates once he passes the first magnetic barrier, the shark will then turn
around as soon as he detects the second magnetic barrier. It is pertinent that these trials continue with the inclusion of the second magnetic barrier so we can increase our chances of completely deterring these
Also, it was found that as the trials progressed, the amount of avoidance behaviors and entrances increased. This may also be an indication that the sharks are slightly stressed in the beginning of the
trials, but acclimate to their surroundings by the end of the trials. This suggests that the trials should be longer in duration to enable us to get more accurate results.
was found to significantly approach the control side of the pen more frequently than the treatment side. This is important because this could potentially indicate that N. brevirostris
is extremely sensitive to these magnets and does not like to be in the magnetic region of the pen. Due to this, it may be important to put a hose divider perpendicular to the fence. This will allow us to have 4 quadrants (2 control and 2 stimulus quadrants). This will enable us to record the amount of time the shark spends in a particular side of the pen (control versus treatment) and will give us the ability to quantify whether or not the shark spends a greater amount of time on the control side of the pen compared to the treatment side.
In conclusion, our data does not firmly suggest that magnets affect N. brevirostris behavior. We cannot assume that the magnets can deter N. brevirostris because there was not a sufficient
amount of trials. With more experiments, we may discover that sharks avoid these permanent magnets, which could have implications on the behavior of other sharks to permanent magnets.